Journal of Geology & Geophysics
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Haruna IV

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• Research Article
  Petrology and Geochemistry of Granitoids of the Northern Part of Adamawa Massif, N.E Nigeria
  Author(s): Haruna IVHaruna IV
  
  The granitoids of the northern part of Adamawa Massif in northeastern Nigeria have been differentiated based on field and petrochemical data into the granodiorite and granites. Although there are slight mineralogical and geochemical differences between the granodiorite and the granites (e.g. Rb/Sr ratios lower in granodiorite than the granites), the two rock units have similar geochemical characteristics. The rocks are characterized by a wide range in SiO2, Calc-alkaline affinity, syn- to within-plate granite signatures, metaluminous to peraluminous composition and more K2O-rich and hypersthenes-poor comparable to fractionated I-type granitoids. The rocks display slightly fractionated to fractionated LREE, almost flat HREE patterns, with significant negative EU and Ba anomalies, Linear major element trends and progressive rise in SiO2, K2O, Rb and Rb/Sr ratios with depleting MgO, Fe2O.. View More»
  DOI: 10.4172/2329-6755.1000177

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